/*
    Udp.cpp: Library to send/receive UDP packets.

    NOTE: UDP is fast, but has some important limitations (thanks to Warren Gray for mentioning these)
    1) UDP does not guarantee the order in which assembled UDP packets are received. This
    might not happen often in practice, but in larger network topologies, a UDP
    packet can be received out of sequence.
    2) UDP does not guard against lost packets - so packets *can* disappear without the sender being
    aware of it. Again, this may not be a concern in practice on small local networks.
    For more information, see http://www.cafeaulait.org/course/week12/35.html

    MIT License:
    Copyright (c) 2008 Bjoern Hartmann
    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.

    bjoern@cs.stanford.edu 12/30/2008
*/

#ifndef _WIFIUDP_H_
#define _WIFIUDP_H_

#include <Arduino.h>
#include <Udp.h>
#include <cbuf.h>

class WiFiUDP : public UDP {
  private:
    int udp_server;
    IPAddress multicast_ip;
    IPAddress remote_ip;
    uint16_t server_port;
    uint16_t remote_port;
    char* tx_buffer;
    size_t tx_buffer_len;
    cbuf* rx_buffer;
  public:
    WiFiUDP();
    ~WiFiUDP();
    uint8_t begin(IPAddress a, uint16_t p);
    uint8_t begin(uint16_t p);
    uint8_t beginMulticast(IPAddress a, uint16_t p);
    void stop();
    int beginMulticastPacket();
    int beginPacket();
    int beginPacket(IPAddress ip, uint16_t port);
    int beginPacket(const char* host, uint16_t port);
    int endPacket();
    size_t write(uint8_t);
    size_t write(const uint8_t* buffer, size_t size);
    int parsePacket();
    int available();
    int read();
    int read(unsigned char* buffer, size_t len);
    int read(char* buffer, size_t len);
    int peek();
    void flush();
    IPAddress remoteIP();
    uint16_t remotePort();
};

#endif /* _WIFIUDP_H_ */
